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Official Description

Lengthening of tendon, extensor, hand or finger, each tendon

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 26476 involves the lengthening of an extensor tendon in the hand or finger. This surgical intervention is typically indicated for patients who present with an extension deformity, which can occur as a result of various conditions, including the late effects of injuries or chronic diseases such as severe rheumatoid arthritis or osteoarthritis. The goal of the procedure is to correct the deformity by adjusting the length of the extensor tendon, thereby restoring normal function and alignment of the affected digit. During the procedure, a skin incision is made over the targeted tendon, allowing for careful dissection of the surrounding soft tissues to expose the tendon. A Z-shaped incision is then created in the tendon itself, which facilitates lengthening by enabling the tendon fibers to slide apart when the wrist is flexed or extended. After the tendon has been lengthened, sutures are placed to secure it in this new position. To ensure proper healing and maintain the desired length of the tendon, the hand or finger is subsequently immobilized using a splint or cast. It is important to note that this code is applicable for each tendon that is lengthened during the procedure, emphasizing the need for accurate reporting in medical coding practices.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 26476 is indicated for the correction of extension deformities in the hand or finger. These deformities may arise from various underlying conditions, including:

  • Late Effects of Injuries - Extension deformities can develop as a consequence of previous injuries to the hand or finger, which may lead to improper healing or alignment of the extensor tendons.
  • Severe Rheumatoid Arthritis - This autoimmune condition can cause significant joint damage and deformities, necessitating surgical intervention to restore function and alignment.
  • Osteoarthritis - Degenerative joint disease can also result in deformities of the hand or finger, prompting the need for tendon lengthening to correct the functional impairment.

2. Procedure

The procedure for lengthening an extensor tendon involves several key steps, which are detailed as follows:

  • Step 1: Incision - A skin incision is made directly over the extensor tendon that requires lengthening. This incision allows access to the tendon while minimizing damage to surrounding tissues.
  • Step 2: Dissection - The surgeon carefully dissects the soft tissues surrounding the tendon to expose it fully. This step is crucial for ensuring that the tendon can be manipulated without obstruction.
  • Step 3: Z-shaped Incision - A Z-shaped incision is created in the tendon itself. This specific incision pattern is designed to facilitate the lengthening process by allowing the tendon fibers to slide apart when the wrist is flexed or extended.
  • Step 4: Suturing - After the tendon has been lengthened, sutures are placed to secure the tendon in its new, elongated position. This stabilization is essential for proper healing and function.
  • Step 5: Immobilization - Finally, the hand or finger is immobilized in a splint or cast. This immobilization is necessary to maintain the desired length of the tendon during the healing process, preventing any movement that could disrupt the surgical correction.

3. Post-Procedure

Post-procedure care following the lengthening of the extensor tendon is critical for successful recovery. Patients are typically advised to keep the hand or finger immobilized in the splint or cast for a specified duration to ensure that the tendon heals properly in its new position. Regular follow-up appointments may be scheduled to monitor the healing process and assess the function of the hand or finger. Physical therapy may also be recommended after the initial healing phase to restore strength and range of motion, although the specifics of rehabilitation will depend on the individual patient's condition and the extent of the procedure performed.

Short Descr TENDON LENGTHENING
Medium Descr LENGTHENING TENDON EXTENSOR HAND/FINGER EACH
Long Descr Lengthening of tendon, extensor, hand or finger, each tendon
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Surgical procedure on ASC list in CY 2007; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P5B - Ambulatory procedures - musculoskeletal
MUE 4
CCS Clinical Classification 160 - Other therapeutic procedures on muscles and tendons
LT Left side (used to identify procedures performed on the left side of the body)
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
F1 Left hand, second digit
F2 Left hand, third digit
F3 Left hand, fourth digit
F4 Left hand, fifth digit
F5 Right hand, thumb
F6 Right hand, second digit
F7 Right hand, third digit
F8 Right hand, fourth digit
F9 Right hand, fifth digit
FA Left hand, thumb
GC This service has been performed in part by a resident under the direction of a teaching physician
RT Right side (used to identify procedures performed on the right side of the body)
T1 Left foot, second digit
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Pre-1990 Added Code added.
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